Influence of Liquid Viscosity on Swallowing Dynamics in Healthy Adults: A Study Using a New Noninvasive Laryngeal Motion Evaluation Instrument

IF 4 3区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE
Yuta Nakao, Tomoyuki Haji
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Abstract

Background

A noninvasive laryngeal motion evaluation device using photoelectric distance sensors (Nodomiru) has been newly developed and reported to be useful in evaluating swallowing dynamics. This device can easily obtain a laryngeal movement velocity curve and a laryngeal movement position curve. In this study, we aimed to examine how liquid viscosity affects the swallowing dynamics after verifying the usefulness of data smoothing in this measurement.

Methods

This study included 33 healthy adults (mean age: 28.8 ± 9.7 years). They were instructed to swallow saliva and 3 mL of thin and medium-thickened liquids three times each in a sitting position. Laryngeal movements during these trials were evaluated using Nodomiru. The comma-separated value data output, which included laryngeal position and time information obtained from Nodomiru, were used to calculate the following parameters: laryngeal elevation time, elevation distance, velocity and laryngeal elevation persistence time with and without smoothing.

Results

The intraclass correlation coefficient values of elevation peak velocity for the three swallowing trials of liquids were higher with smoothing (0.77) than without smoothing (0.54). Elevation peak velocities were 128.9 ± 56.8, 149.8 ± 47.2, and 173.5 ± 62.7 mm/s for saliva, thin liquid (water), and moderately thick liquid, respectively, demonstrating significant differences.

Conclusions

Using a smoothing procedure is beneficial for analysing the swallowing dynamics with Nodomiru. Furthermore, increasing liquid thickness promoted increased laryngeal movement velocity in healthy adults.

Abstract Image

液体粘度对健康成人吞咽动力学的影响:一种新型无创喉部运动评估仪的研究。
背景:一种使用光电距离传感器的无创喉部运动评估装置(Nodomiru)已经被开发出来,并被报道用于评估吞咽动力学。该装置可方便地获得喉部运动速度曲线和喉部运动位置曲线。在本研究中,我们的目的是在验证数据平滑在该测量中的有效性后,检查液体粘度如何影响吞咽动力学。方法:健康成人33例,平均年龄28.8±9.7岁。他们被要求以坐姿分别三次吞下唾液和3毫升的稀液体和中稠液体。在这些试验中使用Nodomiru评估喉运动。使用由Nodomiru获取的喉位置和时间信息的逗号分隔值数据输出,计算下列参数:喉头抬高时间、抬高距离、速度和喉头抬高持续时间。结果:经平滑处理的3种液体吞咽试验的抬高峰速度类内相关系数值(0.77)均高于未经平滑处理的(0.54)。唾液、稀液(水)和中浓液的海拔峰速度分别为128.9±56.8、149.8±47.2和173.5±62.7 mm/s,差异有统计学意义。结论:采用平滑法分析Nodomiru的吞咽动力学是有益的。此外,液体厚度的增加促进了健康成人喉部运动速度的增加。
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来源期刊
Journal of oral rehabilitation
Journal of oral rehabilitation 医学-牙科与口腔外科
CiteScore
5.60
自引率
10.30%
发文量
116
审稿时长
4-8 weeks
期刊介绍: Journal of Oral Rehabilitation aims to be the most prestigious journal of dental research within all aspects of oral rehabilitation and applied oral physiology. It covers all diagnostic and clinical management aspects necessary to re-establish a subjective and objective harmonious oral function. Oral rehabilitation may become necessary as a result of developmental or acquired disturbances in the orofacial region, orofacial traumas, or a variety of dental and oral diseases (primarily dental caries and periodontal diseases) and orofacial pain conditions. As such, oral rehabilitation in the twenty-first century is a matter of skilful diagnosis and minimal, appropriate intervention, the nature of which is intimately linked to a profound knowledge of oral physiology, oral biology, and dental and oral pathology. The scientific content of the journal therefore strives to reflect the best of evidence-based clinical dentistry. Modern clinical management should be based on solid scientific evidence gathered about diagnostic procedures and the properties and efficacy of the chosen intervention (e.g. material science, biological, toxicological, pharmacological or psychological aspects). The content of the journal also reflects documentation of the possible side-effects of rehabilitation, and includes prognostic perspectives of the treatment modalities chosen.
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